Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
new file mode 100644
index 0000000..866f107
--- /dev/null
+++ b/net/ipv6/ip6_input.c
@@ -0,0 +1,269 @@
+/*
+ * IPv6 input
+ * Linux INET6 implementation
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ * Ian P. Morris <I.P.Morris@soton.ac.uk>
+ *
+ * $Id: ip6_input.c,v 1.19 2000/12/13 18:31:50 davem Exp $
+ *
+ * Based in linux/net/ipv4/ip_input.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+/* Changes
+ *
+ * Mitsuru KANDA @USAGI and
+ * YOSHIFUJI Hideaki @USAGI: Remove ipv6_parse_exthdrs().
+ */
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/sched.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/in6.h>
+#include <linux/icmpv6.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/transp_v6.h>
+#include <net/rawv6.h>
+#include <net/ndisc.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#include <net/xfrm.h>
+
+
+
+static inline int ip6_rcv_finish( struct sk_buff *skb)
+{
+ if (skb->dst == NULL)
+ ip6_route_input(skb);
+
+ return dst_input(skb);
+}
+
+int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+{
+ struct ipv6hdr *hdr;
+ u32 pkt_len;
+
+ if (skb->pkt_type == PACKET_OTHERHOST)
+ goto drop;
+
+ IP6_INC_STATS_BH(IPSTATS_MIB_INRECEIVES);
+
+ if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+ goto out;
+ }
+
+ /*
+ * Store incoming device index. When the packet will
+ * be queued, we cannot refer to skb->dev anymore.
+ *
+ * BTW, when we send a packet for our own local address on a
+ * non-loopback interface (e.g. ethX), it is being delivered
+ * via the loopback interface (lo) here; skb->dev = &loopback_dev.
+ * It, however, should be considered as if it is being
+ * arrived via the sending interface (ethX), because of the
+ * nature of scoping architecture. --yoshfuji
+ */
+ IP6CB(skb)->iif = skb->dst ? ((struct rt6_info *)skb->dst)->rt6i_idev->dev->ifindex : dev->ifindex;
+
+ if (skb->len < sizeof(struct ipv6hdr))
+ goto err;
+
+ if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+ goto drop;
+ }
+
+ hdr = skb->nh.ipv6h;
+
+ if (hdr->version != 6)
+ goto err;
+
+ pkt_len = ntohs(hdr->payload_len);
+
+ /* pkt_len may be zero if Jumbo payload option is present */
+ if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
+ if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
+ goto truncated;
+ if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr))) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+ goto drop;
+ }
+ hdr = skb->nh.ipv6h;
+ }
+
+ if (hdr->nexthdr == NEXTHDR_HOP) {
+ skb->h.raw = (u8*)(hdr+1);
+ if (ipv6_parse_hopopts(skb, offsetof(struct ipv6hdr, nexthdr)) < 0) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+ return 0;
+ }
+ hdr = skb->nh.ipv6h;
+ }
+
+ return NF_HOOK(PF_INET6,NF_IP6_PRE_ROUTING, skb, dev, NULL, ip6_rcv_finish);
+truncated:
+ IP6_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
+err:
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+drop:
+ kfree_skb(skb);
+out:
+ return 0;
+}
+
+/*
+ * Deliver the packet to the host
+ */
+
+
+static inline int ip6_input_finish(struct sk_buff *skb)
+{
+ struct inet6_protocol *ipprot;
+ struct sock *raw_sk;
+ unsigned int nhoff;
+ int nexthdr;
+ u8 hash;
+
+ skb->h.raw = skb->nh.raw + sizeof(struct ipv6hdr);
+
+ /*
+ * Parse extension headers
+ */
+
+ nexthdr = skb->nh.ipv6h->nexthdr;
+ nhoff = offsetof(struct ipv6hdr, nexthdr);
+
+ /* Skip hop-by-hop options, they are already parsed. */
+ if (nexthdr == NEXTHDR_HOP) {
+ nhoff = sizeof(struct ipv6hdr);
+ nexthdr = skb->h.raw[0];
+ skb->h.raw += (skb->h.raw[1]+1)<<3;
+ }
+
+ rcu_read_lock();
+resubmit:
+ if (!pskb_pull(skb, skb->h.raw - skb->data))
+ goto discard;
+ nexthdr = skb->nh.raw[nhoff];
+
+ raw_sk = sk_head(&raw_v6_htable[nexthdr & (MAX_INET_PROTOS - 1)]);
+ if (raw_sk)
+ ipv6_raw_deliver(skb, nexthdr);
+
+ hash = nexthdr & (MAX_INET_PROTOS - 1);
+ if ((ipprot = rcu_dereference(inet6_protos[hash])) != NULL) {
+ int ret;
+
+ if (ipprot->flags & INET6_PROTO_FINAL) {
+ struct ipv6hdr *hdr;
+
+ skb_postpull_rcsum(skb, skb->nh.raw,
+ skb->h.raw - skb->nh.raw);
+ hdr = skb->nh.ipv6h;
+ if (ipv6_addr_is_multicast(&hdr->daddr) &&
+ !ipv6_chk_mcast_addr(skb->dev, &hdr->daddr,
+ &hdr->saddr) &&
+ !ipv6_is_mld(skb, nexthdr))
+ goto discard;
+ }
+ if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
+ !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
+ goto discard;
+
+ ret = ipprot->handler(&skb, &nhoff);
+ if (ret > 0)
+ goto resubmit;
+ else if (ret == 0)
+ IP6_INC_STATS_BH(IPSTATS_MIB_INDELIVERS);
+ } else {
+ if (!raw_sk) {
+ if (xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INUNKNOWNPROTOS);
+ icmpv6_param_prob(skb, ICMPV6_UNK_NEXTHDR, nhoff);
+ }
+ } else {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INDELIVERS);
+ kfree_skb(skb);
+ }
+ }
+ rcu_read_unlock();
+ return 0;
+
+discard:
+ IP6_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+ rcu_read_unlock();
+ kfree_skb(skb);
+ return 0;
+}
+
+
+int ip6_input(struct sk_buff *skb)
+{
+ return NF_HOOK(PF_INET6,NF_IP6_LOCAL_IN, skb, skb->dev, NULL, ip6_input_finish);
+}
+
+int ip6_mc_input(struct sk_buff *skb)
+{
+ struct ipv6hdr *hdr;
+ int deliver;
+
+ IP6_INC_STATS_BH(IPSTATS_MIB_INMCASTPKTS);
+
+ hdr = skb->nh.ipv6h;
+ deliver = likely(!(skb->dev->flags & (IFF_PROMISC|IFF_ALLMULTI))) ||
+ ipv6_chk_mcast_addr(skb->dev, &hdr->daddr, NULL);
+
+ /*
+ * IPv6 multicast router mode isnt currently supported.
+ */
+#if 0
+ if (ipv6_config.multicast_route) {
+ int addr_type;
+
+ addr_type = ipv6_addr_type(&hdr->daddr);
+
+ if (!(addr_type & (IPV6_ADDR_LOOPBACK | IPV6_ADDR_LINKLOCAL))) {
+ struct sk_buff *skb2;
+ struct dst_entry *dst;
+
+ dst = skb->dst;
+
+ if (deliver) {
+ skb2 = skb_clone(skb, GFP_ATOMIC);
+ dst_output(skb2);
+ } else {
+ dst_output(skb);
+ return 0;
+ }
+ }
+ }
+#endif
+
+ if (likely(deliver)) {
+ ip6_input(skb);
+ return 0;
+ }
+ /* discard */
+ kfree_skb(skb);
+
+ return 0;
+}